Dell C8621QT User Manual page 57

The display will go into Power Save Mode in 4 minutes.
The display will go into Power Save Mode in 4 minutes.
The display will go into Power Save Mode in 4 minutes.
The display will go into Power Save Mode in 4 minutes.
4. This box also appears during normal system operation, if the video cable becomes
disconnected or damaged.
5. Turn off your display and reconnect the video cable; then turn on both your
computer and the display.
Dell 86 Monitor
No HDMI 3 Cable
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Dell 86 Monitor
No HDMI 4 Cable
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Dell 86 Monitor
No DP Cable
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Dell 86 Monitor
No USB Type-C Cable
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Troubleshooting
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